I'm in the middle of final exams now and have been relieving some stress reading these stories and jerking off! I do it at least once a day. Sometimes it's hard to find the right time or place since I live in a dorm.
My roommate is pretty cool though, I used to hear him do it at night when he thought I was asleep, it would make me so horny that I'd do sometimes do it afterwards but really quietly so he couldn't hear. I thought he would think it weird if I did it right after him.
Then one day he started to play some music-quiet enough to sleep to but loud enough to hide any noises. It's on a timer so it turns off in one hour. This started one day after I was probably being a bit too loud the night before. He didn't say anything, but the next day he was like 'hey wanna put some music on to fall asleep to?'. That night even with the music I could hear him jerking off, but this time I heard the 'squish-squish' sounds of lube! He got really into it for about 10 minutes, then I think I heard a small moan and then nothing. It was too dark to see anything.
From then on, whenever one of us was horny we'd put the music on before turning out the light, its a signal that we need to take care of business. The music is every few nights at this point, and we both feel free to make a little more noise. While I don't need lube since I'm uncut, it does feel better with it and I no longer am so careful about the noises. Sometimes I do it but don't hear him (or fall asleep before he starts). Other times he does it and I'd done it earlier that day or I'm too tired or whatever to do it. Often we do it at the same time.
Now the year is almost over, maybe before we both go home for the summer we'll do it with the lights on? We're not gonna be roommates next year, so its the last chance...